Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 591579fba418bcc6…

MALICIOUS

Office (OLE) / .DOCX

139.5 KB Created: 2020-09-30 06:24:00 Authoring application: Microsoft Office Word
MD5: 69cc01cf4bb8bca09623e272e56eb9f0 SHA-1: a0ae235a6d5faf9bc838b66ca65307de59d54a92 SHA-256: 591579fba418bcc6bd1fc4bb4a299348db435c11b203cd049b17c9830f211087
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9769539-0', strongly indicating the Emotet family. Critical heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject, a common technique for Emotet to download and execute further stages. The obfuscated document body text does not provide direct clues to the lure, but the macro behavior is the primary indicator of malicious intent.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9769539-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9769539-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
bf242d2b3eef8a928e95104450a1995792bbbbd70e8fa1b795dc489b41229ac6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10567 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 28 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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